mdrol cycle question

I'm running mdrol at 20mg ed. Tomorrow I will be three weeks in and results have been nothing short of phenomenal. I'm up 20lbs and my lifts have increased drastically such as my incline DB press going up 20lbs per dumbbell for the same amount of reps. The problem is, my joints are starting to hurt like a mother ****er and I have zero desire to train. Should I just quit the mdrol now or maybe try and rest up for a few days and try and hit it hard again Friday or Saturday? Pct is not an issue as I'm on 350mg of test right now.